scripts: move parse_syscalls.py to scripts/build/

Move scripts needed by the build system and not designed to be run
individually or standalone into the build subfolder.

Signed-off-by: Anas Nashif <anas.nashif@intel.com>

CMakeLists.txt

@@ -688,7 +688,7 @@ add_custom_command(
   ${struct_tags_json}
   COMMAND
   ${PYTHON_EXECUTABLE}
-  ${ZEPHYR_BASE}/scripts/parse_syscalls.py
+  ${ZEPHYR_BASE}/scripts/build/parse_syscalls.py
    --include          ${ZEPHYR_BASE}/include        # Read files from this dir
    --include          ${ZEPHYR_BASE}/drivers        # For net sockets
    --include          ${ZEPHYR_BASE}/subsys/net     # More net sockets

doc/build/cmake/index.rst

@@ -365,11 +365,11 @@ The following is a detailed description of the scripts used during the build pro
 
 .. _parse_syscalls.py:
 
-:zephyr_file:`scripts/parse_syscalls.py`
+:zephyr_file:`scripts/build/parse_syscalls.py`
 ----------------------------------------
 
 
-.. include:: ../../../scripts/parse_syscalls.py
+.. include:: ../../../scripts/build/parse_syscalls.py
    :start-after: """
    :end-before: """